Restructure xml with recursive nodes - xslt

Question

I have an issue in SAP PI with an xml with recursive nodes. I have a Container which can have a SubContainer with (another) Container.
Input xml
<Containers xmlns="https://www.uniconcreation.com/2021/IvenzaShippingContainer">
<Container>
<Name>INTERIEUR1</Name>
<Number>1</Number>
<SSCC>111</SSCC>
<SubContainers>
<Container>
<Id>I1371851</Id>
<SalesOrderNumber>2012231</SalesOrderNumber>
<ProductionOrderNumber>I2017658</ProductionOrderNumber>
<Name>ACCESSOIRE1</Name>
<Barcode>181001371851</Barcode>
<Items>
<Item>
<Id>I8709475</Id>
<SalesOrderRowId>I671068</SalesOrderRowId>
<SalesOrderRowExternalReference>1</SalesOrderRowExternalReference>
<Quantity>1</Quantity>
</Item>
<Item>
<Id>I8709476</Id>
<SalesOrderRowId>I671068</SalesOrderRowId>
<SalesOrderRowExternalReference>1</SalesOrderRowExternalReference>
<Quantity>1</Quantity>
</Item>
</Items>
</Container>
<Container>
<Id>I1371852</Id>
<SalesOrderNumber>2012231</SalesOrderNumber>
<ProductionOrderNumber>I2017658</ProductionOrderNumber>
<Name>PANEEL1</Name>
<Barcode>181001371852</Barcode>
<Items>
<Item>
<Id>I8709492</Id>
<SalesOrderRowId>I671068</SalesOrderRowId>
<SalesOrderRowExternalReference>1</SalesOrderRowExternalReference>
<Quantity>1</Quantity>
</Item>
</Items>
</Container>
</SubContainers>
</Container>
Challenge: I want to move the child Container nodes of the SubContainers to the root level and use the value of SSCC in these nodes. Thus getting rid of the SubContainers element.
Required result
<Containers xmlns="https://www.uniconcreation.com/2021/IvenzaShippingContainer">
<Container>
<Id>I1371851</Id>
<SalesOrderNumber>2012231</SalesOrderNumber>
<ProductionOrderNumber>I2017658</ProductionOrderNumber>
<Name>ACCESSOIRE1</Name>
<SSCC>111</SSCC>
<Barcode>181001371851</Barcode>
<Items>
<Item>
<Id>I8709475</Id>
<SalesOrderRowId>I671068</SalesOrderRowId>
<SalesOrderRowExternalReference>1</SalesOrderRowExternalReference>
<Quantity>1</Quantity>
</Item>
<Item>
<Id>I8709476</Id>
<SalesOrderRowId>I671068</SalesOrderRowId>
<SalesOrderRowExternalReference>1</SalesOrderRowExternalReference>
<Quantity>1</Quantity>
</Item>
</Items>
</Container>
<Container>
<Id>I1371852</Id>
<SalesOrderNumber>2012231</SalesOrderNumber>
<ProductionOrderNumber>I2017658</ProductionOrderNumber>
<Name>PANEEL1</Name>
<SSCC>111</SSCC>
<Barcode>181001371852</Barcode>
<Items>
<Item>
<Id>I8709492</Id>
<SalesOrderRowId>I671068</SalesOrderRowId>
<SalesOrderRowExternalReference>1</SalesOrderRowExternalReference>
<Quantity>1</Quantity>
</Item>
</Items>
</Container>
</Container>
</Containers>
</Containers>
My current xsl
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:ext="https://www.uniconcreation.com/2021/IvenzaShippingContainer" exclude-result-prefixes="ext">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="#* | node()">
<xsl:copy>
<xsl:apply-templates select="#* | node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="ext:Name|ext:Number|ext:SSCC|#*" />
<xsl:template match="ext:Containers/ext:Container/ext:SubContainers[ext:Container]">
<xsl:variable name="sscc" select="/ext:Containers/ext:Container/ext:SSCC"/>
<xsl:for-each select="*">
<xsl:element name="SSCC" namespace="{namespace-uri()}">
<xsl:value-of select="$sscc" /></xsl:element>
<xsl:copy-of select="node()"/>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
I'm not doing a real great job if you look at my result on xsltfiddle :(
I'm stuck with the original parent and I don't manage to get the 2 elements around my child nodes.
Kind regards,
Mike D

Answer 1

If I am guessing correctly, all you need to do is simply:
XSLT 2.0
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xpath-default-namespace="https://www.uniconcreation.com/2021/IvenzaShippingContainer">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
<xsl:template match="/Containers">
<xsl:variable name="sscc" select="Container/SSCC"/>
<xsl:copy>
<xsl:for-each select="//SubContainers/Container">
<xsl:copy>
<xsl:copy-of select="* except (Barcode, Items)"/>
<xsl:copy-of select="$sscc"/>
<xsl:copy-of select="Barcode, Items"/>
</xsl:copy>
</xsl:for-each>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
Result
<?xml version="1.0" encoding="UTF-8"?>
<Containers xmlns="https://www.uniconcreation.com/2021/IvenzaShippingContainer">
<Container>
<Id>I1371851</Id>
<SalesOrderNumber>2012231</SalesOrderNumber>
<ProductionOrderNumber>I2017658</ProductionOrderNumber>
<Name>ACCESSOIRE1</Name>
<SSCC>111</SSCC>
<Barcode>181001371851</Barcode>
<Items>
<Item>
<Id>I8709475</Id>
<SalesOrderRowId>I671068</SalesOrderRowId>
<SalesOrderRowExternalReference>1</SalesOrderRowExternalReference>
<Quantity>1</Quantity>
</Item>
<Item>
<Id>I8709476</Id>
<SalesOrderRowId>I671068</SalesOrderRowId>
<SalesOrderRowExternalReference>1</SalesOrderRowExternalReference>
<Quantity>1</Quantity>
</Item>
</Items>
</Container>
<Container>
<Id>I1371852</Id>
<SalesOrderNumber>2012231</SalesOrderNumber>
<ProductionOrderNumber>I2017658</ProductionOrderNumber>
<Name>PANEEL1</Name>
<SSCC>111</SSCC>
<Barcode>181001371852</Barcode>
<Items>
<Item>
<Id>I8709492</Id>
<SalesOrderRowId>I671068</SalesOrderRowId>
<SalesOrderRowExternalReference>1</SalesOrderRowExternalReference>
<Quantity>1</Quantity>
</Item>
</Items>
</Container>
</Containers>
If the exact order of the child elements of Container does not matter, then it could be even simpler. Instead of:
<xsl:copy-of select="* except (Barcode, Items)"/>
<xsl:copy-of select="$sscc"/>
<xsl:copy-of select="Barcode, Items"/>
you could do:
<xsl:copy-of select="$sscc | *"/>